Natural Gas Pipeline Company Of America

Seventh Revised Volume No. 1

Effective Date: 04/18/2008, Docket: RP08-319-000, Status: Effective

Original Sheet No. 470 Original Sheet No. 470 : Pending

GENERAL TERMS AND CONDITIONS

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24. METHOD OF MEASUREMENT AND MEASUREMENT EQUIPMENT

24.1 UNIT OF VOLUME/FUNDAMENTAL STANDARDS

All quantities referenced in this Tariff, unless

otherwise expressly stated, are in terms of Dth. Where measurement

is by orifice meter, all fundamental constants, observations,

records, and procedures involved in the determination and/or

verification of the quantity and other characteristics of gas

delivered hereunder shall, unless otherwise specified herein, be

in accordance with the standards prescribed in the 1985 edition of

ANSI/API 2530 on "Orifice Metering of Natural Gas" or (at

Natural's discretion) any revisions, amendments, or supplements to

such standards. Where measurement is by other than an orifice

meter, standards commonly accepted in the industry and adopted by

Natural shall be used in the determination of all factors involved

in the computation of gas volumes. Except as otherwise expressly

stated herein, all fundamental constants, observations, records

and procedures involved in determining and/or verifying the

quantity and other characteristics of natural gas delivered

hereunder shall (at Natural's discretion) be in accordance with

such standards therefor as are or may hereafter from time to time

be approved and recommended by the American Gas Association or

such other standards as are commonly accepted in the industry and

adopted by Natural.

24.2 BASIS

The measurement hereunder shall be corrected for

deviation from Boyle's Law at the pressures and temperatures under

which gas is measured hereunder by use of the method specified by

AGA Report #3, Third Edition, October 1990, titled "Orifice

Metering of Natural Gas and other Related Hydrocarbon Fluids,"

Part 1 through Part 4, or (at Natural's discretion) any revisions,

amendments or supplements to such method.

24.3 DETERMINATION OF HEATING VALUE

(a) At Natural's sole option, the heating value of

the gas may be determined by the use of a chromatograph, a

continuous gas sampler, or by the taking of gas samples.